Pizzadish, where is the updated number of possible combinations ?
Hints
1 No digit is used twice
2 First digit is odd
3 Last digit is even
4 1 and 9 are not included
Odds are calculated:
3 (3,5,7 for first #)
x6 (6 numbers left after 1st)
x5 (5 numbers left after 2nd)
x4 (4 numbers left after 3rd)
x3 (3 numbers left after 4th)
=
1080 possible combinations
thanks 4me2c bud but you don't have to thank me in every post lol